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    • 6. 发明专利
    • Improvements in Compound Steam Engines.
    • GB190222821A
    • 1902-12-24
    • GB190222821D
    • 1902-10-20
    • BENNETT WILLIAM THOMAS
    • BENNETT WILLIAM THOMAS
    • 22,821. Bennett, W. T Oct. 20. Compound engines; valves and valve gear.-The cylinder B secured to the bed-plate A has an extension U of smaller diameter than the part B, and in the two portions of the cylinder works; a trunk piston F, F . Steam is admitted to the smaller area in front of the piston F by a rocking valve D. After doing work there and producing the in-stroke, the steam is allowed to expand into the larger end of the cylinder to produce the out-stroke, under the control of a valve mounted in the piston and worked by the connecting-rod. The final exhaust takes place under the control of a rocking valve E. The valve mounted in the piston is in the form of a rocking plug G with ports g capable of being brought opposite ports f in the piston. The plug G has a spindle g' projecting through a diaphragm in the piston and carrying a plate H which is keyed to it. This plate has a notch with which engages a roller carried by a rearward extension of the connecting-rod I, whereby the valve is actuated.